OLPC's founder Nicholas Negroponte discusses educational use of the tablet form factor followed by a discussion with Marvell's co-founder Weili Dai. They are building the $75 XO-3 Tablet for education, to be showcased as prototype within 3 months by next CES. Possibly that the first prototypes may even get to be using the latest wide-view capacitive Pixel Qi LCD screens and the Marvell Armada 628 processor.

To be productive using a tablet, I think plugging a $2 USB keyboard and mouse could still be the best solution. As text entry can hardly be as fast on a tablet, even using haptic feedback or web based voice recognition technology. If the USB keyboard/mouse can be developed to cost $2-3 maximum, then I think it would make sense to provide each child with the $75 tablet and the $2-3 keyboard/mouse combo as well as some kind of cheap bag that holds them together or perhaps even better, the keyboard/touchpad could double as a thin, cheap and light screen protector for the tablet when carrying it around and could as well be clipped onto the back of the tablet when only using the tablet mode.